The report by a team of cross-party MPs also took aim at Twitter, which they said hosted “vast swathes” of abuse and prejudice.

Mr Corbyn hit back at the report for placing a “disproportionate” emphasis on Labour, which was the subject of a major race row earlier this year.

Baroness Chakrabarti has also come under fire for accepting a peerage while working on an independent probe into anti-Semitism in Labour.

Here is a look at the political movement at the centre of deepening anti-semitism row which has engulfed the Labour Party.

What is Zionism?

Zionism is a political movement that supported the establishment of a Jewish homeland, known as Israel, in the Middle East.

What is the definition of Zionism?

“An international movement originally for the establishment of a Jewish national or religious community in Palestine and later for the support of modern Israel,” according to Merriam-Webster dictionary.

Who supports Zionism?

People who identify with Zionism generally support the creation and development of Israel as a Jewish nation. Not all Jews support Zionism.

Where does Zionism come from?

The political movement first emerged in the 1800s in a bid to battle anti-Semitism and establish a Jewish homeland.

In the Hebrew Bible the word "Zion" means Jerusalem, an Israeli city which is recognised as holy by Jews, Christians and Muslims alike.

The term “Zionism” was apparently coined by Viennese Jewish writer Nathan Birnbaum sometime around 1890.

Jeremy Corbyn in pictures

Tue, July 12, 2016

Labour Leader Jeremy Corbyn takes part in a community meeting at the Guru Har Rai Gurdwara Sahib temple

Britain's opposition Labour Party leader Jeremy Corbyn speaks at an anti-racism rally in London

Is the term Zionism misused?

Some members of the Jewish community and other commentators argue that the word Zionism is now misused as a coded attack on Jews.

Labour peer Lord Levy told the BBC's Newsnight: "There can be criticism of the state of Israel, but anti-Semitism - using the word 'Zionist' as another form of anti-Semitism - frankly can no longer be tolerated."

It has been suggested by some that anti-Zionism has been used as a cover for anti-Semitism, which is defined as hosility and prejudice towards the Jewish people.

For example, the word “zio” was regularly used as a ethnic slur by some members of the Oxford University Labour Club, according to its former co-chair Alex Chalmers.

When was Israel created?

Israel was created in the Middle East in 1948 to give the Jewish people a homeland after the extermination of Jews by the Nazis during the Holocaust.

The state of Israel has faced criticism for its government policies on the settlement and treatment of the Palestinian people.